[test] Deflake legacy-link-behavior (#85805)
Suspense around body will trigger "missing tags" warning if something throws in the boundary. This error can come in slightly later and cause flaky test results.
Fixes
```
● Validations for <Link legacyBehavior> › When rendering from a Client Component › warns and throws an error if the child is lazy JSX
expect(received).toMatchInlineSnapshot(snapshot)
Snapshot name: `Validations for <Link legacyBehavior> When rendering from a Client Component warns and throws an error if the child is lazy JSX 1`
```
-- https://github.com/vercel/next.js/actions/runs/19097617827/job/54561506584#step:34:13256
